822-16-2

Basic information

• Product Name: Sodium stearate
• Synonyms: bonderlube235;flexichemb;prodhygine;stearatedesodium;stearicacid,sodiumsalt,mixtureofstearicandpalmiticfattychain;OCTADECANOIC ACID SODIUM SALT;STEARIC ACID SODIUM SALT;SODIUM OCTADECANOATE
• CAS NO: 822-16-2
• Molecular Formula: C₁₈H₃₅O₂*Na
• Molecular Weight: 306.45907
• EINECS: 212-490-5
• Product Categories: Anionic Surfactants;Carboxylate (Surfactants);Functional Materials;Surfactants;metal carboxylate;emulsifier;Food additives
• Mol File: 822-16-2.mol

Chemical Properties

• Melting Point: 270 °C
• Boiling Point: 359.4 °C at 760 mmHg
• Flash Point: 162.4 °C
• Appearance: white/Powder
• Density: 0.2-0.3 g/cm3
• Vapor Pressure: 8.58E-06mmHg at 25°C
• Storage Temp.: 2-8°C
• Solubility: Slightly soluble in water and in ethanol (96 per cent).
• Water Solubility: SOLUBLE IN COLD AND HOT WATER
• Stability: Stable. Incompatible with strong oxidizing agents.
• Merck: 14,8678
• BRN: 3576813
• CAS DataBase Reference: Sodium stearate(CAS DataBase Reference)
• NIST Chemistry Reference: Sodium stearate(822-16-2)
• EPA Substance Registry System: Sodium stearate(822-16-2)

Safety Data

• Safety Statements: 24/25
• RIDADR: 3077
• WGK Germany: 1
• RTECS: WI4725000
• TSCA: Yes
• HazardClass: 9
• PackingGroup: III
• Hazardous Substances Data: 822-16-2(Hazardous Substances Data)

Usage

Uses

Used in Cosmetic Formulations:
Sodium stearate is used as a stabilizer for emulsions like lotions, making products thicker and more viscous. Its effectiveness in stabilizing emulsions makes it a popular choice in the cosmetic industry.
Used in Deodorant Production:
Sodium stearate serves as a major constituent of soap produced by the saponification of oils and fats, making it widely used in the deodorant industry.
Used in Paint and Ink Production:
Sodium stearate is applied in the production of latex paints and inks, contributing to their quality and performance.
Used in Rubber Industry:
As a component in rubber production, sodium stearate enhances the properties and performance of rubber products.
Used in Food Additives and Flavorings:
Sodium stearate is also found in some food additives and flavorings, where it plays a role in improving texture and stability.
Used as a Plasticizer in Chewing Gum Base:
Sodium stearate functions as a plasticizer in chewing gum base, providing the desired consistency and texture.
Used in Pharmaceutical Industry:
In the pharmaceutical industry, sodium stearate is used as a surfactant to aid the solubility of hydrophobic compounds in the production of various mouth foams.
Used as a β-Lactamase Inhibitor:
Sodium stearate can also function as a β-lactamase inhibitor, playing a role in the effectiveness of certain antibiotics.
Used as a Pharamaceutic Aid:
Sodium stearate acts as an emulsifying and stiffening agent in pharmaceutical formulations, such as glycerol suppositories and toothpaste.
Used as a Waterproofing Agent:
Sodium stearate is a fatty acid used as a waterproofing agent, and it is one of the least allergy-causing sodium salts of fatty acids, making it non-irritating to the skin.

References

https://en.wikipedia.org/wiki/Sodium_stearate http://www.tomsofmaine.com/ingredients/overlay/sodium-stearate https://www.reference.com/science/uses-sodium-stearate-d24da30b6b85aa51#

Production Methods

Sodium stearate is produced as a major component of soap upon saponification of oils and fats. The percentage of the sodium stearate depends on the ingredient fats. Tallow is especially high in stearic acid content (as the triglyceride), whereas most fats only contain a few percent. The idealized equation for the formation of sodium stearate from stearin (the triglyceride of stearic acid) follows : (C18H35O2)3C3H5 → C3H5(OH)3 + 3 C17H35CO2Na Purified sodium stearate can be made by neutralizing stearic acid with sodium hydroxide.

Safety Profile

Poison by intravenous route. When heated to decomposition it emits toxic fumes of Na2O.

Purification Methods

It is better to prepare it by adding a slight excess of octadecanoic acid to ethanolic NaOH, evaporating and extracting the residue with dry Et2O. [Beilstein 2 III 1003.]

InChI:InChI=1/C18H36O2.Na/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2-17H2,1H3,(H,19,20);/q;+1/p-1

Synthetic route

2'-hydroxy-4,4',6'-trimethoxychalcone (3420-72-2, 37951-13-6, 64680-84-8) + stearic anhydride (638-08-4) → 2',4,4'-trimethoxy-6'-(octadecanoyloxy)-chalcone + sodium stearate (822-16-2)

Conditions	Yield
In pyridine; ethyl acetate	A 91% B n/a

sodium formate (141-53-7) + stearic acid (57-11-4) → sodium stearate (822-16-2)

Conditions	Yield
In ethanol

methanesulfonic acid (75-75-2) + n-butyl methanesulfonate (1912-32-9) + n-butyl stearate (123-95-5) + stearic acid (57-11-4) → sodium stearate (822-16-2) + methanesulfonic acid sodium salt (2386-57-4)

Conditions	Yield
With sodium hydroxide; water In butan-1-ol at 50 - 175℃; for 0.666667 - 1h; Conversion of starting material;

Upstream product

• 141-53-7 sodium formate 
• 57-11-4 stearic acid 
• 75-75-2 methanesulfonic acid 
• 1912-32-9 n-butyl methanesulfonate 
• 123-95-5 n-butyl stearate 
• 3420-72-2 2'-hydroxy-4,4',6'-trimethoxychalcone 
• 638-08-4 stearic anhydride 

Downstream Products

• 51063-97-9 DL-α,β-distearin 
• 22610-63-5 octadecanoic acid 2,3-dihydroxypropyl ester 
• 504-40-5 1,3-distearoylglycerol 
• 555-43-1 glycerol tristearate 
• 2955-56-8 Eicosan-3-one 
• 112-92-5 1-octadecanol 
• 638-66-4 n-Octadecanal 
• 1115-17-9 α-Sulfostearinsaeure 
• 504-53-0 di-n-heptadecyl ketone 
• 57898-46-1 stearic acid ; antimony stearate 
• 638-08-4 stearic anhydride 
• 5531-65-7 benzyl stearate 
• 96979-65-6 1-phenyl-2-stearoyloxy-ethanone 
• 71843-68-0 stearic acid-[1]naphthylmethyl ester 

Relevant articles and documents

Cation Distribution Assisted Tuning of Magnetization in Nanosized Magnesium Ferrite

The MgFe2O4 nanoparticles are synthesized by combustion method and annealed at different temperatures from 500 to 1000 °C. Magnetic properties, morphology, valence states of iron, crystal structure, and microstructure of the samples

Adsorption of Anions of Higher Carboxylic Acids on Magnesium from Weakly Alkaline Aqueous Solutions

Abstract: The adsorption of sodium salts of higher carboxylates on oxidized magnesium is studied via in situ reflective ellipsometry. It is shown that the free energies of adsorption of sodium oleyl sarcosinate (OsS) and sodium linoleate (LiS) is >55 kJ/mol, indicating the chemisorption of carboxylates on oxidized magnesium surfaces. Electrochemical impedance spectra, voltammetry, and corrosion testing show that sodium oleate (OlS) has the best protective properties on pure and oxidized magnesium. The strong protective properties of OlS are confirmed by Mg plate testing under conditions of a wet atmosphere with daily condensation. Tentative passivation of chemically oxidized Mg in a 16 mmol/L OlS solution protects against corrosion for 92–96 h.

Continuous preparation method of metal fatty acid salt

The invention relates to a continuous preparation method of metal fatty acid salt. The continuous preparation method of the metal fatty acid salt comprises the step of continuously enabling fatty acidand metal hydroxides to react in a solvent and prepare the metal fatty acid salt in a microchannel reactor or pipeline reactor. The preparation method disclosed by the invention can control the particle diameter of a product material to be within 70nm and 1000nm, and the particle diameter of the product material can be adjusted as needed; the metal fatty acid salt is simple in preparation method,short in technological process, few in three wastes (waste water, waste residues and waste gas), beneficial to environmental protection and suitable for industrial production; the reactor used in theinvention has short reaction time, high safety, high efficiency and large productivity, and can realize continuous production, furthermore, the space utilization rate of workshops is high, and mass production can be realized; by adopting the preparation method disclosed by the invention, the solvent can be recycled to lower the production cost; and the preparation method has high conversion rateof raw materials, stable quality and high purity.

Sodium stearate and continuous production process and production line thereof

The invention discloses sodium stearate and a continuous production process and production line thereof. The production process includes: preparing materials: stearic acid, tablet sodium hydroxide and a catalyst; closing a channel valve, adding the materials from a feed port, mixing well the materials, and charging a mixture into a reaction cylinder through the channel valve; closing the channel valve of the reaction cylinder, keeping a certain level of pressure in the reaction cylinder, and heating to obtain a semi-finished product; measuring pH value of the semi-finished product, starting a pressure regulator, and starting a heating device to distill water under reduced pressure; crushing the obtained dry sodium stearate into micro-particles, and automatically packaging to obtain the finished stearate; the continuous production line comprises a feeding cylinder, a reaction cylinder, a separating cylinder and a packaging unit that are connected in sequence. The continuous production process is used for the sodium stearate, the target product with high purity and quality is prepared, the requirement for batch continuous production is met, and production cost is further reduced.

CROSS-LINKED POLYALLYLAMINE TABLET CORE

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Removal of alkyl alkanesulfonate esters from alkanesulfonic acids and other organic media

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Substituted acetophenones and compositions containing them

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Einfluss verschiedener Vorbehandlungen auf die Strukturbildung und thermischen Umwandlungserscheinungen ausgewaehlter Natrium-Seifen

Das thermische Phasenverhalten und die strukturellen Abwandlungen ausgewaehlter Na-Seifen (Na-Kaprylat, Na-Palmitat und Na-Stearat) wurden mit den Methoden der Differential-Scanning-Kalorimetrie, Roentgen- und Elektronenbeugung untersucht.Der Einfluss verschiedener Vorbehandlungen auf die Struktur und thermischen Umwandlungserscheinungen stand im Mittelpunkt des Interesses.Folgende Ergebnisse sind hervorzuheben: 1.Verschiedene Vorbehandlungen (Probenpraeparationen) beeinflussen die Restwassermengen in den Na-Seifen.Zur Herstellung wasserfreier Produkte muss fest gebundenes Wasser (ca. 1/2 mol) unter drastischen Bedingungen entfernt werden. 2.Die Umwandlungstemperaturen und -enthalpien unterschiedlicher Formen obiger Na-Seifen werden angegeben und mit dem Wassergehalt in Beziehung gesetzt. 3.Mit Ausnahme des Kristalls laesst sich der feste Zustand verschieden vorbehandelter Seifen strukturell nicht einheitlich deuten.Die Grenzen bekannter Modellvorstellungen werden diskutiert. 4.Der Kristallzustand laesst sich nur durch Loesungsmittelkristallisation erreichen.Im Kristall sind die Molekuele (NaC18) in einem Gitter der Abmessungen a=9,19 Angstroem und b=8,05 Angstroem gepackt.Die trikline Subzelle TII als Anordnung der aliphatischen Ketten wurde durch Elektronenbeugung an Mikroeinkristallen gesichert.Als Ueberstrukturelemente koennen duenne lamellare Fasern angenommen werden.Eine periodische Anordnung derartiger Fasern ist nachgewiesen worden. 5.Aus den Roentgenbeugungsaufnahmen folgt, dass das Aufschmelzen der Ketten fuer das NaC8, NaC16 und NaC18 einheitlich bei etwa 118 deg C satttfindet und mit einer thermischen Kontraktion und einem Wechsel in der Ueberstruktur verbunden ist.Das Roentgenbeugungsverhalten beim Aufheizen verschiedener Zustaende der Seifen ist jeweils unterschiedlich und konnte nicht in allen Faellen strukturell gedeutet werden.Die Hochtemperaturphasen liessen sich nur beim wasserfreien NaC18 mit dem Modell zentrierter Baenderstrukturen in Uebereinstimmung bringen.